Battery casing

Abstract

A battery casing comprises a lid which closes a battery receiving chamber. Instead of mounting the lid in an outer panel of an instrument in which the battery casing is used, it is directly mounted on the body of the battery casing, thus avoiding the use of the outer panel of the instrument as an electrical conductive path for a battery contained therein. This permits the entire body including the outer panel of the instrument to be formed of a material such as plastics which is inexpensive and easy to machine.

What is claimed is: 
     
       1. A battery casing comprising a non-conductive frame which defines a battery receiving chamber said chamber having an inner sidewall, a terminal member disposed on the bottom of the battery receiving chamber for contact with one electrode of a battery contained therein, another terminal member formed of a resilient material and mounted on the inner sidewall of the battery receiving chamber in surrounding relationship with the periphery of the battery contained therein and electrically connected with the other electrode of the battery, and a lid which is detachably mounted on the frame. 
     
     
       2. A battery casing according to claim 1 in which the lid is formed of an electrically conductive material so that it electrically contacts said another terminal member when it is mounted on the frame, thus providing an electrical interconnection between said another terminal and the other electrode of the battery. 
     
     
       3. A battery casing according to claim 2 in which said another terminal member is in the form of a ring of resilient wire having projecting folds formed therein which are adapted to resiliently engage the inner end face of the lid. 
     
     
       4. A battery casing according to claim 2 in which said another terminal is in the form of a toroidal coil of resilient wire which is adapted to engage the inner end face of the lid. 
     
     
       5. A battery casing according to claim 1 in which the lid is formed of an electrically non-conductive material and wherein said another terminal member is disposed for resilient abutment against the peripheral surface of the battery contained in the battery receiving chamber. 
     
     
       6. A battery casing according to claim 5 in which said another terminal is in the form of a ring of resilient wire having a rectilinear portion which is adapted to resiliently bear against the peripheral surface of the battery contained in the battery receiving chamber. 
     
     
       7. A battery casing according to claim 5 in which said another terminal member comprises a toroidal coil which resiliently bears against the peripheral surface of the battery contained in the battery receiving chamber. 
     
     
       8. A battery casing comprising a non-conductive frame and a lid detachably connected directly to said frame to form a battery receiving chamber said chamber having an inner sidewall, a first terminal member disposed on the bottom of the battery receiving chamber for contact with one electrode of a battery contained therein, a second terminal member formed of a resilient material and mounted on said inner sidewall inside the battery receiving chamber in surrounding relationship with the periphery of the battery contained therein and electrically connected with the other electrode of the battery.